1. Department of Surgery; Central Hospital of Beira; Beira Mozambique
2. Department of Neurosciences; Otolaryngology Section; University of Padova; Padova Italy
3. Operational Research Unit; Doctors with Africa Cuamm; Beira Mozambique
4. Department of Emergency and Organ Transplantation-Section of Thoracic Surgery; University of Bari; Bari Italy